I guess the Microsoft product teams had some time left as new Visual Studio extensions are released:
- Visual Studio Pro Power Tools: http://blogs.msdn.com/b/bharry/archive/2010/06/07/announcing-the-first-visual-studio-pro-power-tools.aspx
- Visualization and Modeling Feature Pack: http://blogs.msdn.com/b/jasonz/archive/2010/06/05/announcing-vs2010-productivity-power-tools-and-modeling-feature-packs.aspx
One feature I like a lot is the ability to create code based on your UML diagrams.